These parts should be used for the following applications: Racing/Performance/Street Rodder where hood restrictions are NOT a consideration.
Holley EFI LS main harnesses have a map sensor connecter designed for use with an LS1/2 style map sensor. The 558-416 is an adapter harness that can be used to adapt any LS harness that uses a LS1/2 MAP sensor connection to a LS3 MAP, which is recommended for this manifold.
NOTE: The EFI versions of the LS HI-Ram intake manifold and fuel rail are designed to accept Bosch Style EV-1 or Magneti Marelli Pico fuel injectors. OE LS fuel injectors may not fit properly in the Hi-Ram EFI intake manifold fuel rail assembly. There is a kit available separately for the LS7 Hi-Ram EFI to allow the use of stock LS7 fuel injectors, P/N 300-230 (see below in the service parts section).
The Holley GM LS3/L92 Modular Hi-Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet-metal for high-performance applications where induction system height is not limited. Coupling this Hi-Ram intake with the high flowing LS3/L92 style cylinder heads has outstanding potential for N/A and forced induction applications at a budget-minded cost. Aggressive, bold, race-bred styling will make bad intentions clear for drag race, muscle car, marine, off-road, sandrails, pulling trucks, track, street-rod applications and more!
• The base is designed to be modular in configuration to accept a wide range of carbureted and EFI tops and to be attractive to builders and fabricators as the foundation for custom induction systems.
• Runner length and the tapered cross-section designed to perform well for a wide range of engine configurations
• EFI fuel rails are machined for -8AN O-ring fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system and come standard with EFI Hi-Ram kits.
• Cast aluminum construction.
• Intended for use on N/A or forced induction engines in the 6.0 to 7.0+ liter range, max power at 7000-8000+RPM.
Features:
Height (Carbureted or EFI, 2x4V Top Mount & Blank) – 11.08” to the lifter valley cover flange on engine block.
Base Plenum Top Mounting Flange Height – 8.42” to the lifter valley cover flange on engine block.
Port Size – 2.49” Height x 1.21” Wide
Mounting Flange Gasket Type – Standard LS3 Molded O-Ring
Plenum Top Gasket Type – 3/32” Round O-ring Cord
Runner Length – 6.50”, As-Cast Runner Cross-Sectional Area – Tapered 4.25 in² to 2.77 in²
Specs
Brand
Holley EFI
Construction
Cast
Emission Code
3
Engine
GM LS3/L92
Finish
Satin
Flange Style
4500
Front Height
11.08 inch
Fuel System Type
EFI
Manifold Type
Hi-Ram
Product Type
Manifold
Rear Height
11.08 inch
RPM Power Band
7000-8000
Part Number
300-114
Emissions
This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.
The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:
1965 and older U.S. manufactured California Certified vehicles
1967 and older U.S. manufactured Federally Certified vehicles
1967 and older Foreign manufactured vehicle
Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.
These parts should be used for the following applications: Racing/Performance/Street Rodder where hood restrictions are NOT a consideration.
Holley EFI LS main harnesses have a map sensor connecter designed for use with an LS1/2 style map sensor. The 558-416 is an adapter harness that can be used to adapt any LS harness that uses a LS1/2 MAP sensor connection to a LS3 MAP, which is recommended for this manifold.
NOTE: The EFI versions of the LS HI-Ram intake manifold and fuel rail are designed to accept Bosch Style EV-1 or Magneti Marelli Pico fuel injectors. OE LS fuel injectors may not fit properly in the Hi-Ram EFI intake manifold fuel rail assembly. There is a kit available separately for the LS7 Hi-Ram EFI to allow the use of stock LS7 fuel injectors, P/N 300-230 (see below in the service parts section).
*Free Shipping & Handling only offered to the contiguous US on orders over $100.
Some parts are not legal for use in California or other states with similar regulations.